A shopkeeper expects a gain of 22.5% on his cost price. If in a week, his sale was of Rs. 392, what was his profit?

A shopkeeper expects a gain of 22.5% on his cost price. If in a week, his sale was of Rs. 392, what was his profit?
A. Rs. 68.20
B. Rs. 70
C. Rs. 72
D. Rs. 88.50
E. None of the above

Answer is:C p=320 nd thus we can obtain the profit i.e sp - cp=392-320=72

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